1517 COMMERCE AVENUE, CARLISLE, PA, USA 17015
TEL: 1 717-243-9900 FAX: 1 717-243-4542
WWW.PRHOFFMAN.COM
PR HOFFMAN MACHINE PRODUCTS
Double-Sided Planetary Lapping/Polishing Machines
Innovations in Flatness
Since 1938
PR HOFFMAN MACHINE PRODUCTS
Machines Overview Double-Sided Planetary Lapping/Polishing Machines
PR Hoffman Machines: Industry Leaders
PR Hoffman provides innovative products to the world’s leading high-tech manufacturers of parts requiring
flat, parallel surfaces. Customers in the semiconductor, electronics, ceramics, optics, quartz, glass, medical
and electro-optics industries rely on our machines for precise, consistent control of dimensional and geo-
metric tolerances and surface finish.
These machines save on space while providing consistent results for your R&D and
small-part or small-batch production. Our low-cost PR Series machines have been
adopted in many industries and have been a workhorse of the industry since 1950.
PR Series—Proven Reliability
Our most advanced machine series can process parts up to 30” (762 mm) in diame-
ter and as thin as 0.0015” (0.038 mm). The programmable independent control of
rotation and downforce and the ability to save recipes provide process flexibility and
consistency.
ServoRSTM
Series—Precision Control
Two Machine Lines Customized for any Process
PR Series - Simple, Reliable, Economical
The PR Series machines offer double-sided lapping and polishing for parts up to
6.6” (167.6 mm) in diameter. Four carrier configurations cover nearly all small part
sizes, and the servo motor controls (on the PR-1) ensure soft ramp-up and slow down
for gentle processing. Touchscreen controls (available on the PR-1 only) display mo-
tor output, as well as ring gear, center gear, and carrier orbit speeds, allowing closer
monitoring, superior control, and greater consistency of the process.
The dual motor version of the PR-1 machine, with separate motors driving the ring
and center gears, allows greater control of the machine dynamics. This control ena-
bles in-process plate flattening and superior part flatness, resulting in improved quali-
ty, less down-time, longer plate/pad life, and greatly reduced cost of ownership.
Space-saving design: Small footprint allows the PR Series to fit almost anywhere
Economical: The low cost, proven performance, and reliability of the PR Series
machines allow our customers to achieve a low cost of ownership
Versatile design: Part diameters can range up to 6.6" (167.6 mm) in diameter and
as thin as 0.003” (0.076 mm)
Easily paired with ServoRSTM Series or similar large machines: The PR Series fits
into any lineup and can be used for rough or fine lapping, grinding, or polishing.
PR-1 PR-2
Optional dual motor for greater control and im-
proved cost of ownership
Table top design well-suited for laboratories and re-
search & development
Simple, rugged design for reduced downtime
and maintenance cost Ideal for small, thin parts
Stationary bottom plate for better precision and
fewer defects Soft-start variable speed drive for gentle part handling
PR HOFFMAN MACHINE PRODUCTS
PR Series Overview Proven Reliability
PR HOFFMAN MACHINE PRODUCTS
ServoRSTM
Series Overview
Precision Control
ServoRSTM
—Precision Control
The ServoRSTM line consists of double-sided lapping and polishing machines suit-
ed for nearly all applications requiring parts to be made flat and parallel. Our ma-
chines can apply downforces ranging from 15 lbs (6.8 kg) to 2200 lbs (1000 kg) to
easily accommodate thin, fragile parts as well as parts requiring more aggressive
processing. The integrated touchscreen Windows PC allows access to machine
manuals, schematics and technical information in situ and offers storage for all
your recipes with easy access right at the operator’s control terminal.
All of our ServoRSTM machines come standard with servo motor drives, capable of
the smooth, soft starts and stops required to manage thin or fragile parts. All ma-
chines (excluding Mark-IV) have a retractable ring gear to ease in the removal of
delicate, hard to handle parts. Our standard multi-step programming format ena-
bles extensive flexibility in ramping up speeds and loads for a process recipe per-
fectly suited to your parts.
For a full list of optional features see the back page of this brochure or visit:
www.prhoffman.com/machines.html
1500 / 1900 ServoRSTM
The 1500 and 1900 ServoRSTM machines are known for their versatility in part
processing. These machines can process very thin parts down to 0.0015”
(0.038 mm) and can apply as little as 15 lbs (6.8 kg) of downforce, ideal for pro-
cessing fragile parts. Both machines have standard 3-way or optional 4-way mo-
tion control.
3100 ServoRSTM
The 3100 ServoRSTM is a mid-sized machine with sprocket pin drive that reduces
maintenance cost by allowing for the replacement of individual pins rather than a
complete machined gear. The maximum downforce available is 550 lbs
(249.5 kg), double the force of the 1500 and 1900 machines, for greater part ca-
pacity and more aggressive processes. The 3100 has standard 3-way or optional
4-way motion control.
Able to process parts down to
0.0015” (0.038 mm) thick
3-way or 4-way motion control
options
Excellent process capacity with double
the downforce of 1500 and 1900
3-way or 4-way motion control
options
Innovations in Flatness
Since 1938
5400 ServoRSTM
The 5400 ServoRSTM machine has a large 53.5” (1359 mm) plate that can pro-
cess parts up to 19.2” (488 mm) in diameter. Its downforce can range from 50 lbs
to 2200 lbs (23 kg - 1000 kg) which gives the user great versatility in part pro-
cessing. The 5400 comes standard with a sprocket pin drive that reduces mainte-
nance cost by allowing for the replacement of individual pins rather than a com-
plete machined gear.
Mark-IV ServoRSTM
The Mark-IV ServoRSTM machine has a standard counter-rotating bottom plate
and outboard driven idler pinions in order to accommodate very large parts in a
compact footprint. The 66” (1676 mm) plate is capable of processing parts up to
30” (762 mm) in diameter. Additionally, the Mark-IV can be reconfigured for differ-
ent carrier sizes by a simple repositioning of the outboard pinions. Such change-
overs can be performed with minimal downtime.
6600 ServoRSTM
The 6600 ServoRSTM is our largest machine with a 66” (1676 mm) plate capa-
ble of processing parts up to 25.6” (650.2 mm) in diameter. The plate and sub-
plate are thick and heavy to maintain a flatter and more stable lapping or pol-
ishing surface. The 6600 comes standard with a sprocket pin drive that reduces
maintenance cost by allowing for the replacement of individual pins rather than
a complete machined gear.
Ø53.5” (1359 mm) plate to process
parts up to 19.2” (488 mm) in dia.
Downforce of 50-2200 lbs (23-1000 kg)
for broad process versatility
Largest part size capacity up to
30” (762 mm) in diameter
Switch between two carrier sizes on
one machine with minimal downtime
Ø66” (1676 mm) plate to process
parts up to 25.6” (650 mm) in dia.
Downforce of 50 - 2200 lbs (23 -
1000 kg) for broad process versatility
Innovations in Flatness
Since 1938
PR HOFFMAN MACHINE PRODUCTS
Machine Specifications Double-Sided Planetary Lapping/Polishing Machines
Carrier Teeth
and Type
Standard Lap Plate Diameter Nominal
ID x OD
Number of Carriers
Carrier Root Diameter
Maximum Part Circle
Recommended Min Work Thickness
Nominal Downforce
Drive Power Standard Voltages Required Service Dimensions
Length x Width x Height
Approximate Machine Weight
PR-2 32T Gear Ø 3.5" x 6.9" (Ø 88.9 mm x 175.3 mm) 5 2.5"
(63.5 mm) Ø 2.1"
(Ø 53.3 mm) 0.003"
(0.076 mm) 3.5 - 3.75 lbs (1.6 - 1.7 kg)
1/17 HP (0.04 KW)
115 VAC, 60Hz, 1-Ph 220 VAC, 50Hz, 1-Ph 15 Amps 12" x 12" x 16"
(0.31 m x 0.31 m x 0.41 m) 96 lbs
(43.5 kg)
PR-1
Single Motor Dual Motor
208 / 230 VAC, 60Hz, 1-Ph
15 Amps Single Motor
46" x 26" x 50" (1.2 m x 0.66 m x 1.3 m)
Single Motor
32T Gear Ø 11" x 14.4" (Ø 279.4 mm x 365.8 mm) 13 2.5"
(63.5 mm) Ø 2.1"
(Ø 53.3 mm) 0.003"
(0.076 mm) 19 - 27 lbs
(8.6 - 12.2 kg)
1.0 HP (0.75 Kw)
2 x 0.5 HP (0.75Kw total)
880 lbs (399.2 kg)
50T Gear Ø 9.4" x 14.3" (Ø 238.8 mm x 363.2 mm) 8 4"
(101.6 mm) Ø 3.6"
(Ø 91.4 mm) 0.005"
(0.127 mm) 24 - 36 lbs
(10.9 - 16.3 kg)
66T Gear Ø 6.8" x 14.3" (Ø 172.7 mm x 363.2 mm) 5 5.3"
(134.6 mm) Ø 5"
(Ø 127 mm) 0.008"
(0.203 mm) 6 - 44 lbs
(2.7 - 20.0 kg)
20 Amps Dual Motor Single Motor Dual Motor Dual Motor
85T Gear Ø 7.0" x 18.8" (Ø 177.8 mm x 477.5 mm) 5 6.9"
(175.3 mm) Ø 6.6"
(Ø 167.6 mm) 0.010"
(0.254 mm) 10 - 80 lbs
(4.5 - 36 kg) 1.5 HP
(1.125 KW) 2 x 0.75 HP
(1.125Kw total) 1150 lbs
(521.6 kg)
1500
32T Gear Ø 9.8" x 13.8" (Ø 248.9 mm x 350.5 mm) 12 2.5"
(63.5 mm) Ø 2.1"
(Ø 53.3 mm) 0.0015"
(0.038 mm)
15 - 200 lbs (6.8 - 90.7 kg)
3-Way
56" x 37" x 86" (1.4 m x 0.94 m x 2.2 m)
3-Way
TP / CG / RG: 1 HP (0.75 Kw) 208 / 230 VAC 60Hz 3-Ph 15 Amps 1980 lbs
(898 kg)
50T Gear Ø 8.7" x 15" (Ø 221 mm x 381 mm) 8 4"
(101.6 mm) Ø 3.6"
(Ø 91.4 mm) 0.004"
(0.102 mm) 380 VAC, 50 Hz, 3-Ph 10 Amps
4-Way 4-Way
66T Gear Ø 6.2" x 14.8" (Ø 157.5 mm x 375.9 mm) 5 5.3"
(134.6 mm) Ø 5"
(Ø 127 mm) 0.005"
(0.127 mm) TP / BP / CG / RG: 1 HP (0.75 Kw) 208 / 230 VAC 60Hz 3-Ph 20 Amps 2230 lbs
(1011.5 kg) 380 VAC, 50 Hz, 3-Ph 12 Amps
1900 85T Gear Ø 6.8" x 19.1" (172.7 mm x 485.4 mm) 5 6.9"
(175.3 mm) Ø 6.6"
(Ø 167.6 mm) 0.008"
(0.203 mm) 15 - 275 lbs
(6.8 - 124.7 kg)
3-Way
56" x 37" x 86" (1.4 m x 0.94 m x 2.2 m)
3-Way
TP: 2 HP (1.5 Kw) CG / RG: 1 HP (0.75 Kw)
208 / 230 VAC, 60Hz, 3-Ph 20 Amps 2090 lbs (948 kg) 480 VAC, 60Hz, 3-Ph 10 Amps
380 VAC, 50 Hz, 3-Ph 12 Amps
4-Way 4-Way
TP / BP: 2 HP (1.5 Kw) CG / RG: 1 HP (0.75 Kw)
208 / 230 VAC, 60Hz, 3-Ph 30 Amps 2340 lbs
(1061.4 kg) 480 VAC, 60Hz, 3-Ph 15 Amps
380 VAC, 50 Hz, 3-Ph 18 Amps
3100 60ST Sprocket (Pin Drive)
Ø 10.5" x 31.4" (Ø 266.7 mm x 797.6 mm) 5 11.6"
(294.6 mm) Ø 10.9"
(Ø 276.9 mm) 0.010"
(0.254 mm) 15 - 530 lbs
(6.8 - 240.4 kg)
3-Way
74" x 44" x 93.5" (1.9 m x 1.1 m x 2.4 m)
3-Way
TP: 5 HP (3.7 Kw) CG / RG: 1 HP (0.75 Kw)
208 / 230 VAC, 60Hz, 3-Ph 40 Amps 4400 lbs
(1995.8 kg) 480 VAC, 60Hz, 3-Ph 20 Amps
380 VAC, 50 Hz, 3-Ph 25 Amps
4-Way 4-Way
TP / BP: 5 HP (3.7 Kw) CG / RG: 1 HP (0.75 Kw)
208 / 230 VAC, 60Hz, 3-Ph 60 Amps 4650 lbs
(2109.2 kg) 480 VAC, 60Hz, 3-Ph 30 Amps
380 VAC, 50 Hz, 3-Ph 40 Amps
5400 100ST Sprocket (Pin Drive)
Ø 17" x 53.5" (Ø 431.8 mm x 1358.9 mm) 5 19.7"
(500.4 mm) Ø 19.2"
(Ø 487.7 mm) 0.010"
(0.254 mm) 50 - 2200 lbs
(22.7 - 997.9 kg) TP: 20 HP (15 Kw) CG: 5 HP (3.7 Kw)
RG: 7.5 HP (5.6 Kw)
480 VAC, 60Hz, 3-Ph 50 Amps 106" x 74" x 117"
(2.7 m x 1.9 m x 3 m)
*Shipping Height is 100" (2.5 m)
15200 lbs (6894.6 kg)
380 VAC, 50 Hz, 3-Ph 60 Amps
(Optional: 208 / 230 / 380 VAC 3-Ph) (Optional Contact Factory ~100 Amps)
6600 140ST Sprocket (Pin Drive)
Ø 18.83" x 66" (Ø 478.3 mm x 1676.4 mm) 4 27.7"
(703.6 mm) Ø 26.72"
(Ø 678.7 mm) 0.025”
(0.635 mm) 150 - 2200 lbs (68 - 997.9 kg)
TP: 20 HP (15 Kw) CG: 5 HP (3.7 Kw) RG: 7.5 HP (5.6 Kw)
480 VAC, 60Hz, 3-Ph 50 Amps 121" x 89" x 117"
(3.1 m x 2.3 m x 3 m)
*Shipping Height is 100" (2.5 m)
18000 lbs (8165 kg)
380 VAC, 50 Hz, 3-Ph 60 Amps
(Optional: 208 / 230 VAC, 60 Hz, 3-Ph) (Optional Contact Factory ~100 Amps)
Mark-IV
178T Gear
Ø 18.8" x 66" (Ø 477.5 mm x 1676.4 mm) 4
27.7" (703.6 mm)
Ø 26.3" (Ø 668 mm)
0.108" (2.74 mm)
150 - 2000 lbs (68 - 907.2 kg)
TP: 10 HP (7.5 Kw) CG: 5 HP (3.7 Kw) BP: 10 HP (7.5 Kw)
480 VAC, 60Hz, 3-Ph 50 Amps 106" x 74" x 117"
(2.7 m x 1.9 m x 3 m)
*Shipping Height is 100" (2.5 m)
15200 lbs (6894.6 kg)
202T Gear 31.5" (800.1 mm)
Ø 30.0" (Ø 762 mm)
380 VAC, 50 Hz, 3-Ph 60 Amps
(Optional: 208 / 230 / 380 VAC 3-Ph) (Optional Contact Factory ~100 Amps)
1517 COMMERCE AVENUE, CARLISLE, PA, USA 17015
TEL: 1 717-243-9900 FAX: 1 717-243-4542
WWW.PRHOFFMAN.COM
Innovations in Flatness
Since 1938
PR HOFFMAN MACHINE PRODUCTS
Machine Options Double-Sided Planetary Lapping/Polishing Machines
o - Optional Feature
s - Standard Feature
More options available on our website:
www.prhoffman.com/machines.html
Contact us:
+1 (717) 243-9900
Your Success = Our Success
PR-1 PR-2 1500 1900 3100 5400 6600 Mark-IV
Machine Options:
Counter-Rotating Bottom Plate (4-Way) N/A o o o N/A s
Dual Motor for Ring and Center Gear o N/A
Top Plate Drive o o s s s s s s
Stainless Steel Ring and Center Gear o o o o s s s s
Stainless Steel Roller Pins N/A o o o N/A
Top Plate Lifter o
N/A (Standard 85T)
Abrasive Distribution System o o s s s s s s
Water Sprayer o o s s s s s s
Plate Options:
Serrated Plates (All Types) o o o o o o o N/A
Ductile Martensite Plates o o o o o o o N/A
Stainless Steel Clad Cast Iron Plates N/A o o s
Stainless Steel Plates o o o o o o o o
Light Weight Plates o N/A
Cooled/Heated Plates o N/A Bottom Plate Only o o N/A
Measurement System:
Automatic Sizing Control o o o o o o o o
Digital Sizing Control o o o o o o o o
Part out of Carrier and Crash Protection o o o o o o o o
Dial Indicator Thickness Measuring Gauge o o N/A
Accessories:
Heat Exchanger for Water Cooling/Heating o N/A o o o o o N/A
Flatness Gauge o o o o o o o o
Conditioning Gears/Sprockets o o o o o o o N/A
Carriers o o o o o o o o
Brush Carriers o o o o o o o o
Diamond Conditioning Carriers o N/A o o o o o o
Diamond Conditioning Hand Tool o o N/A